ARM: Kirkwood: Convert LSXL to restart-poweroff driver.

Add a device tree node and remove the C code.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Tested-by: NMichael Walle <michael@walle.cc>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/kirkwood-lsxl.dtsi

@@ -172,6 +172,10 @@
 		alarm-gpios = <&gpio1 8 0>;
 	};
 
+	restart_poweroff {
+		compatible = "restart-poweroff";
+	};
+
 	regulators {
 		compatible = "simple-bus";
 		#address-cells = <1>;

arch/arm/mach-kirkwood/Kconfig

@@ -227,6 +227,7 @@ config MACH_KM_KIRKWOOD_DT
 config MACH_LSXL_DT
 	bool "Buffalo Linkstation LS-XHL, LS-CHLv2 (Flattened Device Tree)"
 	select ARCH_KIRKWOOD_DT
+	select POWER_RESET_RESTART
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Buffalo Linkstation LS-XHL & LS-CHLv2 devices, using

arch/arm/mach-kirkwood/board-lsxl.c

@@ -25,19 +25,6 @@ static struct mv643xx_eth_platform_data lsxl_ge01_data = {
 	.phy_addr	= MV643XX_ETH_PHY_ADDR(8),
 };
 
-/*
- * On the LS-XHL/LS-CHLv2, the shutdown process is following:
- * - Userland monitors key events until the power switch goes to off position
- * - The board reboots
- * - U-boot starts and goes into an idle mode waiting for the user
- *   to move the switch to ON position
- *
- */
-static void lsxl_power_off(void)
-{
-	kirkwood_restart('h', NULL);
-}
-
 void __init lsxl_init(void)
 {
 	/*
@@ -46,7 +33,4 @@ void __init lsxl_init(void)
 
 	kirkwood_ge00_init(&lsxl_ge00_data);
 	kirkwood_ge01_init(&lsxl_ge01_data);
-
-	/* register power-off method */
-	pm_power_off = lsxl_power_off;
 }